llvm-project

ecaf6738 - [libc++][format] Applied `[[nodiscard]]` to more classes (#170808)

[libc++][format] Applied `[[nodiscard]]` to more classes (#170808) `[[nodiscard]]` should be applied to functions where discarding the return value is most likely a correctness issue. - https://libcxx.llvm.org/CodingGuidelines.html Some classes in `<format>` were already annotated. This patch completes the remaining.